Hi Papa,

,
Sorry you are having concerns about your partner's fidelity. Another option to cheating is that your partner may be engaging in push/pull type behavior. She will push you away when things feel too close or intimate and when she feels like you are backing off, she will pull you back in because she fears rejection.
She may also be cheating, but without any real evidence, it probably wouldn't be wise to confront her on that.
Have you tried to have a conversation with her about how you feel? Perhaps you could try to share with her that you miss being physically close with her and that it confuses you when you get flirty texts from her, but when you are together things seem off.